Kiri

Tel.: +1 514 315 1872 17 April 2025

Ref.: AN 2/33-25/30

Subject: Approval of Amendment 4 to the PANS-AIM

Action required: a) Implementation of the amendment

on 27 November 2025; and b) Publication of any

differences as of 27 November 2025

Sir/Madam,

I have the honour to inform you that the Air Navigation Commission, acting under

delegated authority, on 4 February 2025, approved Amendment 4 to the Procedures for Air Navigation

Services — Aeronautical Information Management (PANS-AIM, Doc 10066), for applicability on

27 November 2025. The amendment was approved on 4 April 2025 by the President of the Council on

behalf of the Council in accordance with established procedure. Copies of the amendment are available as

attachments to the electronic version of this State letter on the ICAO-NET (http://portal.icao.int) where you

can access all other relevant documentation.

Amendment 4 relates to an improved definition of meteorological authority. It arises from

the fifth meeting of the Meteorology Panel (METP/5).

An implementation task list, including an outline of guidance material and an impact

assessment for the amendment are presented in Attachments B and C, respectively. An overview of the

approval process for Amendment 4 to the PANS-AIM is also included for your information in

Attachment D.

Your Government is invited by the Council to implement the provisions of the PANS-AIM,

as amended. In this connection, I draw your attention to the decision taken by the Council, on

1 October 1973, to discontinue the publication of differences in Supplements to the PANS documents and,

instead, to request States to publish up-to-date lists of significant differences from PANS documents in their

Aeronautical Information Publications (AIPs).

999 Robert-Bourassa Boulevard

Montréal, Quebec

Canada H3C 5H7

Tel.: 514 954-8219-

Fax: 514 954-6077-

Email: [email protected]

www.icao.int

International

Civil Aviation

Organization

Organisation

de l’aviation civile

internationale

Organización

de Aviación Civil

Internacional

Международная

организация

гражданской

авиации

- 2 -

May I, therefore, invite your Government to publish in your Aeronautical Information

Publication a list of any significant differences which will exist on 27 November 2025 between the amended

provisions of the PANS-AIM and your national regulations and practices.

Accept, Sir/Madam, the assurances of my highest consideration.

Juan Carlos Salazar

Secretary General

Enclosures:

A — Amendment to the Foreword of the PANS-AIM

B — Implementation task list and outline of guidance

material in relation to Amendment 4 to the PANS-AIM

C — Impact assessment in relation to Amendment 4 to the

PANS-AIM

D — Overview of approval process for Amendment 4 to

PANS-AIM

for

ATTACHMENT A to State letter AN 2/33-25/30

AMENDMENT TO THE FOREWORD OF THE

PANS-AIM (DOC 10066)

Add the following element at the end of Table A:

Amendment Source(s) Subject(s) Approved

Applicable

4 Fifth meeting of the Meteorology

Panel (METP/5)

Consequential amendment

for the improved definition

of meteorological authority.

4 April 2025

27 November 2025

— — — — — — — —

ATTACHMENT B to State letter AN 2/33-25/30

IMPLEMENTATION TASK LIST AND OUTLINE OF GUIDANCE MATERIAL IN RELATION

TO AMENDMENT 4 TO PANS-AIM (DOC 10066)

1. IMPLEMENTATION TASK LIST

1.1 Essential steps to be followed by a State in order to implement Amendment 4 to the

PANS-AIM:

a) conduct a gap analysis between the new and modified ICAO provisions and national

regulatory framework;

b) identify the rule-making process necessary to transpose the new and modified ICAO

provisions into national regulations, where necessary;

c) draft the necessary modifications to the national regulations and means of compliance;

d) officially adopt the national regulations and means of compliance;

e) establish a national implementation plan that takes into account the new and modified

ICAO provisions;

f) implement the new and modified national regulations by the relevant stakeholders;

g) modify the oversight framework according to the new and modified national

regulations;

h) oversight by the State of the implementation of the regulations; and

i) publish significant differences, if any, in the State’s AIP.

2. STANDARDIZATION PROCESS

2.1 Approval date: 4 April 2025

2.2 Applicability date: 27 November 2025

2.3 Embedded date(s): None.

B-2

3. SUPPORTING DOCUMENTATION

3.1 ICAO documentation

Title Type (PANS/TI/Manual/Circ)

Planned

publication date

Procedures for Air Navigation Services —

Meteorology (PANS-MET, Doc 10157)

PANS Q4 2025

3.2 External documentation

Title

External

Organization Publication date

None.

4. IMPLEMENTATION ASSISTANCE TASKS

Type Global Regional

Educational

campaigns

IATA, IFATCA and IFALPA Webinars with PIRGs and WMO

5. UNIVERSAL SAFETY OVERSIGHT AUDIT PROGRAMME (USOAP)

5.1 No amendment of the USOAP CMA protocol questions is required. This will be assessed

during the next amendment cycle of the protocol questions.

— — — — — — — —

ATTACHMENT C to State letter AN 2/33-25/30

IMPACT ASSESSMENT IN RELATION TO

AMENDMENT 4 TO THE PANS-AIM (DOC 10066)

1. INTRODUCTION

1.1 Amendment 4 to the PANS-AIM is a consequential change resulting from an improved

definition of meteorological authority.

2. IMPACT ASSESSMENT

2.1 Consequential amendment for the improved definition of

meteorological authority

2.1.1 Safety impact: There is no impact on aviation safety with the implementation of this

amendment.

2.1.2 Financial impact: There is no financial impact with the implementation of this amendment.

2.1.3 Security impact: There is no impact on aviation security with the implementation of this

amendment.

2.1.4 Environmental impact: There is no environmental impact with the implementation of this

amendment.

2.1.5 Efficiency impact: There is no efficiency impact with the implementation of this

amendment.

2.1.6 Expected implementation time: Since this amendment is consequential, the implementation

time is relative to the entity implementing it.

— — — — — — — —

ATTACHMENT D to State letter AN 2/33-25/30

OVERVIEW OF APPROVAL PROCESS FOR

AMENDMENT 4 TO PANS-AIM

Amendment concerning Source(s)

Preliminary

review by

the ANC

State letter

and date

Final review

by the ANC

No. of replies at

final review

Approved

Applicable

Consequential changes for

the improved definition of

meteorological authority

Fifth meeting of the

Meteorology Panel

(METP/5)

24 November 2022

(ANC 221-5)

AN 10/1-23/1

26 January 2023

13 June 2024

(ANC 226-7

and

ANC 226-8)

74 Contracting States

5 int. org.

Total: 79 Replies

4 April 2025

27 November 2025

— END —

AMENDMENT No. 4

TO THE

PROCEDURES

FOR

AIR NAVIGATION SERVICES

AERONAUTICAL INFORMATION

MANAGEMENT

(Doc 10066)

INTERIM EDITION

The text of Amendment No. 4 to the PANS-AIM (Doc 10066) was approved

by the President of the Council of ICAO on behalf of the Council on

4 April 2025 for applicability on 27 November 2025. This interim edition is

distributed to facilitate implementation of the amendment by States.

Replacement pages incorporating Amendment No. 4 are expected to be

distributed in October 2025. (State letter AN 2/33-25/30 refers.)

APRIL 2025

INTERNATIONAL CIVIL AVIATION ORGANIZATION

NOTES ON THE PRESENTATION

OF THE AMENDMENT 4 TO THE PANS-AIM

The text of the amendment is arranged to show deleted text with a line through it and new text

highlighted with grey shading, as shown below:

1. Text to be deleted is shown with a line through it. text to be deleted

2. New text to be inserted is highlighted with grey shading. new text to be inserted

3. Text to be deleted is shown with a line through it followed

by the replacement text which is highlighted with grey

shading.

new text to replace existing text

2

TEXT OF AMENDMENT 4

TO THE

PROCEDURES FOR AIR NAVIGATION SERVICES

AERONAUTICAL INFORMATION MANAGEMENT (DOC 10066)

. . .

Chapter 1

DEFINITIONS

. . .

Metadata. Data about data (ISO 19115*). Note.— A structured description of the content, quality, condition or other characteristics of data.

Meteorological authority. The entity arranging for the provision of meteorological service for international

air navigation on behalf of a Contracting State, and providing regulation and oversight of the

meteorological service.

Meteorological service provider. The relevant entity designated to provide meteorological service for

international air navigation on behalf of a Contracting State. . . .

Chapter 5

AERONAUTICAL INFORMATION PRODUCTS AND SERVICES

. . .

5.5 PRE-FLIGHT INFORMATION SERVICES

. . .

5.5.6 Automated pre-flight information systems providing a harmonized, common point of access by operations personnel, including flight crew members and other aeronautical personnel concerned, to aeronautical data and aeronautical information in accordance with 5.5.3 and meteorological information in accordance with 9.4.1 of Annex 3 — Meteorological Service for International Air Navigation, should be established by an agreement between the civil aviation authority or the agency to which the authority to provide service has been delegated in accordance with 2.1.1 c) of Annex 15 and the relevant meteorological authority service provider.

. . .

3

Appendix 2

CONTENTS OF THE AERONAUTICAL

INFORMATION PUBLICATION (AIP)

. . .

PART 1 — GENERAL (GEN)

. . .

GEN 1. NATIONAL REGULATIONS AND REQUIREMENTS

GEN 1.1 Designated authorities

The addresses of designated authorities concerned with the facilitation of international air navigation (civil

aviation, meteorology, customs, immigration, health, en-route and aerodrome/heliport charges, agricultural

quarantine and aircraft accident investigation) containing, for each authority:

. . .

8) website address, if available.

Note.— In the context of meteorological service for international air navigation, both the

meteorological authority and the meteorological service provider(s) are to be indicated in the AIP as

designated entities, in accordance with Annex 3, Chapter 2, 2.1.4 and 2.1.5, respectively.

. . .

GEN 3. SERVICES

. . .

GEN 3.5 Meteorological services

. . .

GEN 3.5.5 Notification required from operators

Minimum amount of advance notice required by the meteorological authority service provider from

operators in respect of briefing, consultation and flight documentation and other meteorological information

they require or change.

Editorial Note.— Propose to retain reference to “meteorological authority” in GEN 3.5.6 below since the corresponding provision in Annex 3 (5.1) related to air-reports is addressed to the Contracting State.

GEN 3.5.6 Aircraft reports

4

As necessary, requirements of the meteorological authority for the making and transmission of aircraft

reports.

. . .

PART 2 — EN-ROUTE (ENR)

. . .

ENR 5. NAVIGATION WARNINGS

. . .

ENR 5.3 Other activities of a dangerous nature and other potential hazards

. . .

ENR 5.3.2 Other potential hazards

#AIP-DS# Description, supplemented by charts where appropriate, of other potential hazards that could

affect flights (active volcanoes, nuclear power stations, etc.), including:

. . .

4) authority or service provider responsible for the provision of information; and

5) remarks.

. . .

— END —